op micomb



Oct. 30, 1928.

J. T. LANDGRAF BAFFLE FOR COAL BURNING HEATERS Filed Jan. 23, 1928 ke/ hr. fle W1 Patented Oct. 30, 1928.

p innsums- 1386B a'i mmionmaormxcomni IIJLINQIS; issmimnkre Ammonia swan: nibb UCTS 003,1 or macommxizpmms, mcomomma on nmmuxsi inventioukrelatesite stoves 01* heaters for use with solid fuel, and more particularly to the classmfi such heateiis in which the normalhdl'a'f ti upthe flue; is retarded by the inter- I position of ai checksdnait chamber or other bathe- ;arnanggement l between the; combustion cliamber ofithe heaten'andthe flue;v

Wham heaters of! this glass a rei used with: some kinds of :Euel',- such as cheap gnaeles t? 1 soft eoail', ceiirainlcenstfitueuts Of: theicombus tiun'; gases will condense. .iu' the flue pipe t0 form a more ou'lesszsticli fliquicl whieh drops dowwinta the heateivaht collects on aiiyhafi fie por t ion that mayrundenhang the flue pipe,l

wllile therrelatively ceolerz walls 0f the flue pipe also eolleeusoot whichndrops clown into the heatem The-resulting. cemb ination of soot with tai'ry'oniotherwise'visceus deposits farms stieky' aeeumulhtio'n which guaclually 'clogs the passages leadiug fremthe comibustionl chamber efthuy heater into such a:

draft chamber, thereby iiiterfeniiig' Witluthe: .efieeti-ve ope atiomef the heater. TliisiryteI l'k-venee has proven pauticuhivly" serious with heaters in \vhieh the walls of thehaflle chamberoneheeltdraftchamber are cast; in-- tegml with thestoveibedy; since theinterior 0f' the chamber: is not readily acee'ssihle for remowing'sueh deposits;

If present 'nventiou aims to overcome these difficultiesbyproviding" a. heater in whicha readily remov able and easily cleaned hafllemembeu cooperates with wall poivtibns of the heaterbody to formsuch a cheek-draft Y chamlier; and i'n which the b'aflle 1 member is cdnst'nictechso that it cannot be chopped-accidentally inmehe infieriei of'the-*lieater bedy.

It; alse provides a heater construction fur this purpose, which can readily he'built in a: siiupie flint tepped form with; very littl shoving in= the castings, whieh will insure safe att'aehilig ofthebaflle member to *thebo'cl'y, which will readily permit the substitution mif difl'er ently fbrm'ecl bafllemmnbers su'itedfit o vari ployed equally well withflfifere-ntshapes (if stovehedies. Mbl-eoveiv, my invention provides a heater of thiscl'ass in whieh'the pass sages connecting-the combustion chamber of} 1 the heater with thetheek-draft chamber L'ah readily be adj ustecl iu'size:

Furthermore, my mvention provides ah ah fie member which afionls=acheek-thraft chain ber within theheater aml whichean readily lee employed with a dampepcontrelled inlet combustion chambeuq tutheflueroollarfiv a combustion gases tlweughtihehafliemember.v

"Fig. 24s? a!fragmentary-rear view,t'ake'Ir frfimvthe linea -f Figi-l. I Fig.8 is alho'rizental' sectiom taken alhng the*lli'ne 3-3:0i Figvlax V Fig: isa; penspeetiive View of the-baffle membenfshuwmin-Figs. 11t013u l L Fig. 5 ism vertical sectibmthnoughz the upperpontien of: another'heater. embodyingrmy i,nveution;,namely one having no inlet for admitting fvesh air; tu bllQiGllGClG- ch'alt cham. her and having 110 i adj ustable cont-1'01 of the resul ictibn of thergas passage by the baffle 1nen11lieLqLand. ailso having: (llffel'llil' ill' l'a-ngbe 8 ments fon suppoivtingsthehaflle members Y i Fig; fi is aiperspectiwei view of the baffle member' ofi l l 1 Fig. .7: is a perspective view of anet'henfomn' of bafilei memben suitable for use' with the heater body of Figzi Luamelyonehming no: 7 adj list-able central of the "combustien gases gassing fnom the: eombustionwchamber t0 the ue. V u Referring, first to tfhei-emhadiment of- Figs. 0a 1 t0 3, these figures show a heater body 1 having amupperf uel inlet normally closed by a lid 2 andz'amuppeiflflue collar 3-supp01-ting; the usual flue pipe- 4:; 'Bo restrict the rate: at

which the gasesoi'xeombustien: pass-from the inte rior oh the upperpart of theheateizbody (whiehris the combustion chamber 7 of the; heater); I provide aibafilemember construct edi i'tSrSllO'WIll separately imF-ig. 4'1 'FhisEin flue collar and whieh may. have its endswclose tmtheadj acentsidhs oii'the heatenrhody l, and a men webr 6 exten ding lietween the effective fuel. inlet ancl the filler When supported as" i in Fig; 1, this-baffle member ea -operates with thesidgi'eari and topzwallsof the heater body to femn asclieck draft eh ambei' l"? UIldil l12H1g* ingethe 'flue; through which chamberi tha gases of combustion 1 muste go *impassing I nomrtlie To admit the gases to this chamber I provide one or more passages and preferably dispose at least a portion of these passages in the battle bottom 5 and directly under the fine. I also desirably provide means for adjustably controlling the total effective size of such passages, so that the rate of gas flow can be controlled within the heater in proportion to the nature of the fuel, the barometrieally afl'ccted flue draft, and the room temperature. Illustrative of such a control arrangement, Figs. 3 and 4; show the bafiie bot tom as having two sector-shaped apertures 8 controlled by a damper 9 which is rotatably mounted on the battle bottom and which has similarly shaped aperatures 10 adapted to be brought more or less into alinement with the battle bottom apertures 8.

To support the batiic member in its above described operative position I preferably provide spaced means for supporting the free end of the baflie bottom 5 and the upper end of the riser (or partition-forming) part (3 from the heater body. In Figs. 1 and 3, this heater body is provided in its rear wall with a check-draft opening 11 controlled by a damper, which may be automatically operated after the manner shown in application No. 226,652 of IVilliam Dow Harvey, filed October 17, 19:27, on a coal-burning brooder. \Vhere such a chcck-draft opening is provided at the opposite edge of the baflie bottom from the riser web 6, I preferably make the baffle bottom of such an effective length as to extend into the opening 11, so that the lower edge of this opening will support the free end of the baflle bottom. Since such a check-draft opening is usually of less width than the heater wall in which it is formed, I accomplish this by providing the baflle bottom 5 at its free end with an extension 13 projecting into the said opening. This extension preferably corresponds in width closely to that of the opening, so as to aid in centering the bailie member laterally of the heater body.

The other end of the baflle member is preferably supported extcriorly of the stove body and in such a manner as to deter an accidental dropping of the baffle member into the stove. For this purpose, I desirably make the riser web 6 of such a height as to fit snugly under the stove lid 2 and I provide this riser web adjacent to its upper edge with oppositely directed fingers 15 resting respectively on the upper ends of the two sides of the heater body 1. I also desirably provide means on the riser web whereby this can readily be gripped for raising it, such as the twowinged socket 16 of Figs. 1 and 3. Vith this arrangement for supporting the batlle member, I also preferably form the stove lid 2 with a portion engaging the face of the riser web which is directed away from the support for the free end of the battle bottom, as

by providing the lid with a downwardly directed ledge 18. With the stove lid and heater top formed in any usual manner for definitely positioning the lid, such a ledge compels the user to slide the baffle member into its proper position (namely, with the free end of its bottom adequately supported in the aperture 11) before the lid can be set into its closure position, after which the lid holds the baflle member against sliding away froin the heater wall which supports the free end of its bottom.

\Vhen the lid is removed, the bafile member can readily be withdrawn, particularly it provided with a socket as here shown. During its withdrawal, and also when replacing the baffle member, the projecting fingers 15 (which have their tips spaced by a greater distance than the interior width of the heater body at its top) prevent the bafile member from being dropped into the heater even with careless handling. IVhen the bafllle member is withdrawn from the heater body, the soot, flue drop and other deposits can easily be scraped off the same; and if a rotatable damper is employed as in Figs. 1 to 4, a rotation of this will shear oil any deposits that may have gathered in the openings.

In practice, the ballie member need not have either its bottom or its riser web extend close to the walls of the heater body, as a part of the combustion gases and smoke may be allowed to pass between these walls and the edges of the baffle member. However, I have found that when any considerable spaces are left adjacent to the walls of the heater body, the deposits which collect there are much more diilicult to detach than from a removable bafile member. For this reason, I preferably arrange the gas passage spaces so that at least the greater portion of the gases will pass through perforations in the baflie member, but I may leave spaces also adjacent to the walls of the heater body thereby keeping part of the hot gases closer to these walls.

However, I do not wish to be limited in this respect, nor to the particular supporting arrangements above described or to the use of my battle member in a heater body having a lateral check draft opening. Many changes might obviously be made without departing either from the spirit of my invention or from the appended claims, and I also do not wish to be limited to the use of the various novel features of my invention in conjunction with one another.

Illustrative of other embodiments of my invention, Fig. shows upper portions of a heater in which the checledraft chamber 17 has no inlet for air from outside the heater body 18'. In this case. the bailie member has spaced apertures 19 in its bottom 20, while the free end of this bottom is supported by a screw 21 extending through a wall of the heater body. The riser web 22 of the same lie battle member has its upper end recurved to form "a hook 23 which hookspver a-ri'b Q-ton the top of the heater body, and the lid n this casemay be formed to .fit over the hook formation 23. r v

Fig. 7 shows another baffle member suitable for use with the heater body of Figskl and 2, but having no means forvarying the size of the gas passages.

W ith baflle members of the types of Flgs. 4 and 7 the heater body may have upwardly open notches, such as the notch 26 of- Fig. 3 inwliieh the fingers 15 are sooketechthereb-y permitting the upper end of the b aille memher to be flush with the adjacent upper 'end portionsef the heater body; as'also shown by the njotch'27 of Fig. 5. With the heater body thus formed,-'one riser Wall of each notcherr theadjacentouter face of the adjacent finger to prevent the battle member from slidwall of the check=draft chamber, 1 cause care the desiredcontrol of the heat while retaining more of the heat within the heater body, thus also saving fuel. w

. l claimas my invention 1. A coal burning heater comprising a body having a flue aperture and-a fuel aperture in its top, and a battle member adapted to be removed through the fuel aperture; the bafile member having an upper end projecting through the fuel a erture and supported by.

the upper end of t 1e heaterbody, the baflle also having a lower portion supported by the said body at the opposite side of the flue aperture from its upper end, the said upper ends of the baflle member and the heater body having coacting portions which interengage to prevent the bafiie member from sliding Within the heater body toward the fuelaperture.

2. A coal burning heater comprising a body having a flue aperture and a fuel aperture in its top, and a bafile member adapted to be removed through the fuelaperture, the bafile member having an upper end supported by heater body adjacent to the fuel aperture and having a lower portion supported by the body at the opposite side of the flue aperture from its said upper end, and a lid normally closing the fuel inlet and overhanging the a said upper end of the baflle member, the lid and the baflle-member having inter-engaging portions arranged to prevent the baflle anember from sliding within the heater body toward the fuel aperture.

3. Aeoal burningheatercomprisinga body having a flue aperture in its top and a check draft aperture in a lateral body wall near.

the flue aperture, and a battle member disposed within the body the battle member coniprisi'ng a riser Web supportedat-its'upperend by the top of the heater body, and a bottom edge of the check draft aperture, the body having a fuelaperture partially overhanging the upper end of the said upright Web; in

combination with a lid for the fuel inlet, the

lid having a portion engagingthe' said upright web to prevent movement of the battle member away from the flue aperture.

4. In a'coal burning heater, a body having a check-draft aperture in a side wall thereof near the top of the heater, the body also hav-' ing a flue opening adjacent'to the said aperture and a fuel opening on the opposite side of the flue opening from the checledra'ft'a pen ture; and a baflle member having its main 7h having an edge portion resting-on the lower portions disposed Within the body and adapt ed to be removed through the fuel opening,

the battle member comprising a riser Web on tending between the flueopeningand the fuel opening, and a bottom extending from the lowerend of the riser webto the said side wan, the saidbottom projecting at its freeend into the side wall aperture and resting on the lower edge of that aperture the upper end of the body having a ledge port-ion underhan'ging an :upper end portion of the'baflle member,

Whereb the saidledge portion and "the lower edge of the check-draft aperture 'co-operate in supportingthebafile andwhereby the baiile' member cooperates with adjacent parts o fthe heater in forming a check draft chamber'connecting the flue with the said aperture; and

means engaging the upper end ofthe bafile member to prevent movement of the latter away from the check-draft aperture.

5. In a coal burning heater, a body having a flue aperture and a fuel opening in its top and having an upwardly open notch in the upper edge of each of two opposite side walls and adjacent to the fuel'opening; and a baflie member comprising a bottom underhanging the flue aperture and a riser Web extending upward from one end of the horizontal web adjacent to the fuel opening, the ris'er web having two projections normally seated respectlvely on the bottoms of the said notches,

and the heater body having a ledge supporting a part of the battle member spaced from the said vertical web; the said riser Web eX- tending near to the side walls of the heater body and the horizontal web having portions cut away to provide gas passages through it.

6. In a coal burning heater, a body member'comprising a body having a flue aperture and a fuel opening in its top and a lid for the fuel opening; and a battle member disposed within the heater body and having its main portion adapted to be withdrawn through the fuel opening, the battle member comprising a bottom and a riser web extending upwardly from one edge of the said bottom through the fuel opening and adjacent to the flue opening; the body having two horizontally spaced portions cooperating to support the battle member in its said disposition, the body member having two portions normally engaging opposite faces of the said riser web to prevent horizontal movement of the battle member towards or away from the flue opening.

7. A coal burning heater comprising a body having a flue aperture and a fuel opening in its top and having a check-draft aperture in a lateral body wall near the flue aperture; a battle member normally disposed within the body and eon'iprising a riser web supported at its upper end by the top of the heater body, and a horizontal web having an edge portion supported by the said body wall, one of the said webs having an opening for the passage of combustion gases through it; and a control member disposed entirely within the heater body and adjustably mounted on the last named web for controlling the ellective size of the said passage, the control member having a portion disposed for cooperating with walls of the said passage to shear oii deposits which have collected in the passage.

8. In a coal burning heater, a body including sides and a top, the body being provided in its upper portion with a flue opening and a check-draft aperture; a battle member removably supported within the body and includ ing a bottom web underhanging the flue opening and a riser web, the said webs extending close to two sides and the top of the body and coacting with the said sides and body to form a chamber under the flue opening, the bottom web having passages through it forming the sole connection between the said chamber and the combustion chamber oi the heater; and a damper rotatably mounted on the bottom web for controlling the said passages, the damper having edge portions adapted to cooperate with edges of the said passages for shearing otl deposits which have collectedl in the said passages.

9. A coal burning heater including a body member having a line aperture in its top; a baille member removably supported within the body member and coimerating with parts 01" the body member to ati'ord a check-draft chamber below the flue aperture and above the combustion chamber of the heater; the baille member having a portion underhanging the flue aperture and tormed to provide one or more passage ways ati'ording the major connection for the flow of combustion gases from the combustion chamber to the checkdraft chamber; and a damper disposed entirely within said cheek-draftchamber and movably mounted on the batlle member for adj ustably controlling the flow of COll'llJllSiLlOll gases through a passageway; the heater having a movably mounted exterior portion through which the battle member can be withdrawn to permit the detaching of deposits from the batlle member, the arrangement being such that the battle member when within the heater must be in its normal position be fore the said exterior portion can be move 1 to its normal position.

Signed at Macomb, Illinois, January 20th,

JACOB T. LANDGRAF. 

